what is keeping most people from playing are UI, graphics, PS3 release and content.
I would suggest getting the game up and on the new servers as soon as possible with a new UI ready for PS3. then worry about dungeons and such. Let's get the basics of the game in place and release the PS3 version sooner.
New maps and battles would be nice but being able to actually have the game functional for all would be nice. I think doing this and then charging would be much better.